Physics A-Level
Attenuation and penetration
What Attenuation and penetration means in Physics A-Level, as defined for AQA.
Definition of Attenuation and penetration
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Reference: AQA
Higher frequency gives finer detail but greater attenuation, limiting penetration; strong reflection occurs at boundaries with large acoustic impedance mismatch, such as soft tissue to bone or air.
Topics that use Attenuation and penetration
- Ultrasound imaging (A-level only) (AQA A-Level)
Related terms
- A-scan
- Acoustic impedance
- Acoustic impedance and reflection
- B-scan
- Comparison with X-ray, CT and MRI
- Coupling gel
- Intensity reflection coefficient
- Non-ionising safety
Using Attenuation and penetration in the exam
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